The most probable answer to this problem would be C. A global mass extinction.
The Mesozoic Era or what they commonly refer to as the age of the dinosaurs, is yet to be established as to what really did cause the extinction of life during this era. The popular belief and what is shared to the public to be remembered is that it was caused by an asteroid impact. The dust and ashes that it produced blocked the sky for days which caused the continuous death of organisms. In other sources, it can be said that massive volcanic eruptions occurred and filled the atmosphere with carbon dioxide. With the help of microbes eating carbon dioxide, they superheated the planet because in the process, these microbes eat carbon dioxide and release methane. Another one would be massive and continuous volcanic release of lava. It wasn't exactly determined if either one or maybe all of them occurred at once to wipe out life on that era.
If the situation is this one: "The night was cold and windy. We stayed outside to study the constellations", then, the correct use of conjunctive adverb can be seen in option A <span>our breath frosted the night air; nevertheless, we lingered outside to study the constellations.
**It might be said that conjunctive adverbs are used to connect, to join words, phrases or clauses together in order to clarify what the writer is saying.
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"Stoop from your cold height, Helen Grey, Come down, and take a lowlier place; Come down, to fill it now with grace; Come down you must perforce some day: For years cannot be kept at bay, And fading years will make you old; Then in their turn will men seem cold, When you yourself are nipped and grey" .<u>It's saying that he needs to get off his high perch or no one will love him and he will grow to be old and alone.</u>
I think it would be sentence 5
